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Author Topic: low hours LISTER HR4 PROBLEMS  (Read 5073 times)

barry100

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low hours LISTER HR4 PROBLEMS
« on: April 18, 2014, 04:26:21 AM »
Hi all
Just stripped a fully recon'ed by the local Lister specialists a  Lister HR4 with very low hours ( maybe test hours no work?) which was smoking on two cylinders, the top piston ring  on one had worn the chrome off the ring and I could see where the chrome had worn in a gap and was blowing through, all the other  the top rings had worn the chrome also, the rest of the rings were perfect, the pistons and ring were the  a /market brand AE normally a good product. I decided to fit a full set of genuine Lister rings, when deciding to hone the cylinders, on  checking with a torch I found  only one cylinder was normal ( but this had a worn chrome ring)  shiny but no hone marks, one cylinder ( not a smoking one) was not bedded in at all, I could see all the hone marks from top to bottom very clear, the other two were half bedded in, non had any scuff marks or signs of seizing, non of the top rings that had the chrome worn off had large gaps (only 20 thou) and the gaps on all the other rings were normal , it didn't look a rough hone job , I gave it another hone and now they all look OK and the same,and will be fitting the genuine new rings, any comments on this would be welcome
Regards Barry             

Schwen

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Re: low hours LISTER HR4 PROBLEMS
« Reply #1 on: April 18, 2014, 05:31:49 AM »
Is it possible that whoever recon'ed it put chrome rings in chrome bores? It seems a bit unusual to have chrome worn off rings if it's done so few hours.....

And when you say smoking on two cylinders, do you mean black or blue smoke?

barry100

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Re: low hours LISTER HR4 PROBLEMS
« Reply #2 on: April 18, 2014, 07:10:32 AM »
Hi Schwen
Thanks for the imput, The chrome rings were in "non liner" parent metal cast- iron cylinders, The smoke was white (ish)  indicating loss of compression, I did take the rings to another Lister specialist, and his opinion was dirt in bores caused it, ( I didn't know about the liners condition at the time.
Regards Barry